Well engine is in, wiring 1/2 done, brakes have been bled 8 times and they are still mushy. We expect to be driving this weekend...

it looks like we are a little off from our 375 lb target. we are around 400 +/- 5lbs



Looks like the drivers need to take a ****, a piss and deprive themselves of water before they drive.

front

kinda overkill for a single cylinder ATV engine....

so much fun!

carbon fibre is bling

this guy can't drive, i watched him back into a concrete wall earlier this week, he has a nice gash on his bumper you can't see.

**** wrong pics

here is the one for the last post

Looking good. Where's your restrictor and intake setup. It's my understanding that the biggest downside to a single cylinder (asside from the low revs) is uneven flow through the restrictor.

Good luck with the brakes.

You guys are using an ATV motor. Don't you think that might be a little too much torque. We've always had great succes with motorcycle motors.



- Hand

The torque is actually a good thing for us. However you are certingly correct about the uneven intake flow into the engine due to the single cylinder.



I'm not a supporter of the single cylinder, the decision to use a single was made last year. we put some bolt ons and stuff hoping to get more power. The effects of the large changes in pressure waves can be compensated by using a huge intake chamber/runner volume at the sacrafice of throttle response.



Next year they will move back to a 500 cc 4, or maybe some sort of V-twin.

electrical tape mount for the radiator? nice.



our car is getting just as ghetto every day. we'll have to clean up these little "tweaks" and "mods" before comeptiton.



looking good. did yall invest in a carbon fiber company before this year... https://www.nopistons.com/forums/pub...1047683785.gif

oh yeah, our car ended up costing around $18000. that's $3000 less than our car last year. and we weight 30 lbs less than last year. i'm happy about that.



today we are going to tune the suspension on a skidpad.

are those aluminum MMC brake discs?



large crush zone. they dont exactly define what the crush zone has to be made from, we we made it out of 3/8" x 0.035 wall chromoly tubing. haha, it's light. we're going experiments to see how much "crash" energy they absorb.

haha, that is just for mock up, we will make a mount for it later.

we use some sort of aluminum foam infront of the brace. The tubes are thin wall aluminum.



Yes they are MMC aluminum brake rotors, the trade name is Duralcan, we are sponsored heavily by alcan. Before they changed the rules for the rear roll bar being made out of the heavy ass mild steel our car was 315 lbs 7000 series aluminum.

steering wheel reminds me of darth vader, gauges kind of look

like his eyes



im shot

https://www.nopistons.com/forums/upl...1082074402.jpg

Eh?

https://www.nopistons.com/forums/pub...1047683785.gif funny cuz it's true

i'm sure it's lighter and cheaper than our momo type thing, or whatever brand it is

we looked into have a british company cast us our front rotors out of that duralcan stuff, but decided to go with a ferodo disc off the shelf so we didn't have to manufacture the disc.



oh, and our differential broke today in testing. we drill and tap into the zexel housing to mount the end caps which mount to the sprocket, and it broke / fatigued. it's done it in the past, i dont know why our drivetrain guys used the same design. $400 down teh drain. we have an extra in teh shop, we'll just throw that on in the mean time until they figure out what to do.

you mean the housing of the diff broke?



We got a full ingot of the stuff, we get alcan to extrude it into a solid bar of 10 inches? i think ic an't remember, and it gets cut by another sponsor by high pressure water.



It's pretty crazy stuff.

hahah, that thing is made out of 12 layers of carbon fibre.

that's our initial guess, since diff fluid was leaking out, and metal shavings were in the fluid. the diff housing has broken in the past, so that's why we think it's teh same thing again.



adam is taking it apart tonight, so we'll see what happens. they think the tranny might have locked up, causing the diff to break. unlikely story, but we'll see what comes of the disassembly. either way, downtime for me, time to live it up, senior year style.

When is saw that Tec3, I was like https://www.nopistons.com/forums/pub...1047683572.gif

if was still on the team next year, i would push for no diff, just sproket, with two CV joints for independant rear suspension and save like 20 lbs for the whole contraption.



I like the Go-kart philosphy, not formula1 Shumacher and ferrari ideas.

i just found out the bolts sheared off, the diff didn't break.



lucky i guess. but how did three 7/16 bolts shear off? tranny problems?

go use some shoulder bolts instead.



usually people break drive shafts not diffs.

We had serious tranny problems last year, and it's looking to be the same this year as well. I'm still pushing hardcore for a rotary, there's one we can use from a snowmobile, but it's a single rotor. If we could get a custom e-shaft made and make a center housing and time it out and what not I think it would be pretty sweet. Granted we would have not a lot of torque off the line, but it would do well around the course with a high rev limit. We blew our clutch out at the last auto-x last season but replaced it in 45 minutes to be able to run the next heat. It's a fun sport, and I love working on the kart. I'd take some pictures of ours but the director always gets pissy about us taking pictures for anything other than our own purposes.



- Steiner

doubtful that SAE committee will alloy rotary engines. A highly tuned 610cc engine will still be lighter and produce more HP then a single rotor engine.



In my opinion the ultimate setup would be a 500cc 4 cylinder 4 stroke honda motor from a japanese race bike made to run aircooled, E85. CVT. No diff. Monoshock concept. Full carbon monoquoqe, Al MMC brake rotors. No aero,



If you can get that under 350 lbs and under 15,000 USD you will place 1 number for sure provided you don't break anything.

and provided you have a good enough driver to drive it.



- Hand

driving skill really doens't have much to do with it. If you finish the 20 min endurance race you are automatically top 33% of all compeititors. If you did well in the design part you and finsiehd all dynamic events and the enduro you are most likely going to finsih top 15.



We finsihed 34th out of 140, and we only ran in one dynamics event last year after the engine blew, and the master cylinder wouldn't release.



Driver skill plays a small part in this competition.



Too bad their endurance race is 20 mins. Personally i think endrurance race means 6 hours plus, but i guess then no one would finish. Kinda sad that all that work and more then 50% of the cars cant even run for 20 mins.

Wow, I almost totally disagree with you. https://www.nopistons.com/forums/pub...IR#>/smile.png

I think you could totally blow off all the design judging and presentations and just drive the pants off the car and win the whole show. The difference between the top 10-15 teams, in terms of driving, and everyone else is huge. No amount of design points will make up for poor driving, imo.

I personally believe if you can finish all the driving events you are golden. Most teams break their cars after 1 or two driving events. If you finish the enduro you are sitting pretty.

Simply finishing them will not get you very far. Sure finishing the enduro pretty much guarantees you top 1/3, but beyond that the majority of the points are won in dynamic events.

Last year Queens only scored 41 points out of a possible 150 for the autocross. Your fastest driver was 10 seconds slower than the top 5 finishers. Where do you plan to make up those 160 points?

If you look at the way the points are awarded per event, it should be clear that the dynamic events are where all the points are won. I don't think there has ever been an overall winner that wasn't top 5 in the auto-x and the enduro.

Your strategy is hinged on the failure of other teams, and will probably never get you above 20th.

Good luck

i guess it depends on what your goals are, Queen's has been lacking in the past several years in reliability. We build our car while we drive down to detroit almost, zero test time. Our goals are place top 10, and number 1 in canada.

that used to be the case when teams like only cornell and UTA were running the competition.



more new schools are joining, and the competition is getting much more intense. teams can no longer rely on winning the dynamic events to win.



the winners are now being decided by design points and presentation. in the next 5-10 years, i'm sure the top 10 teams will be decided by things like cost and fuel economy.



this year, we too an approach to win design, lower cost, win presentation, and win all dynamic events. i dont think anything short of those goals will win the competition.

Well, you definitely have to get the reliability there first. We're still struggling with it.

I agree with the Aggie, in 10 years the overall winner will probably have to win pretty much every event.